Expansion joint



April 13,1926. 1,580,325

' L. H. PERRY EXPANSION JOINT Filed May 5. 1925 & 1 I

/Z 1 8 I 1 i 1- 5 l I 'E T g. Z.

Inventor;

' .Zeroy if. ferry,

Per;

Jttorzzey.

Patented Apr. 13,1926. V

LEROY H. rnnnx'or GARDENA, CALIFORNIL'ASISIGNOB mosrn vernnrrsnme TOOL .COMPANY, or LOS enemas, CALIFORNIA, A oonronarronor CALIFORNIA.

Expansion JOINT. 1

Application filed May 5, 192-5. "SeriaI No. 28,182 I 7 To Fail whom-it m-aig homer/1.: V

Be it known that 1, LEROY H. PERRY, a

citizen of the United States, residing at Gardena, in the county of Los Angeles and State ofv California, have invented a new and useful Expansion Joint, of which a specification is set forth below.- w

' In this specification, and'the accompanythan those Specifically mentioned, are inmg drawing, 1 shall describe and-show a preferred form of'my invention, and specifically mention certain of its more important ob ects.

I do notlimit myself to the formsdisclosed,

since various changes and adaptations may be made therein thout departing from the essence of' my invention as hereinafter claimed; and objects and advantages, other adapted for supporting heavy weights hung. therefrom; second, toprovide a joint capable of relatively great longitudinal slipping:

without sacrificing alignment; and, third,to provide a construct-ion that is simple and relatively inexpensive.

. mospheric'temperature is lowered into a well and bottomed therein, as soon as the hot fluid My objects are attainedin the manner illustrated in the accompanying drawing, in which Figure 1 is a longitudinal central section .of my complete joint by itself;

Figure 2 is a sectional elevation of thelower port-ion of a deep well with my joint installed on the discharge pipe therein, the

figure being drawn to a much reduced scale,

and

Figure 3 is a broken elevation of a modified form of my joint on a scale intermediate between the other two figures. I

Similar reference numerals refer to similar parts throughout the several views. It is well known that in deep wells, where the depth is say several thousand feet, the

temperature of the liquid being pumpedis relatively high. This temperature is of course communicated to the discharge line and results in great longitudinal expansion thereof. Thus if the discharge line at: at-

begins to flow therethrough a large amount of expansion takes place. The force'exerted by this expansion when the discharge line is bottomed is very great and results either in the buckling of the lineor damage to the closure of the well atthe surface.

' 'Myinvention permits of longitudinalslipping of the cooperating. parts of-anexpam sion joint suflicientto takeup thevar'iation in length in the discharge pjipedue toflvariar.

tions in temperature. It is obvious that such adevice as above described must be-capable of sustainingrelatively.heav y weights .hung therefrom when it is being lowered :into the well. Unless adequate provision is made for carrying these weights the expansion joint is liable to be damaged by stretching,- Orother;

wise, in such amannerathat it will-eitheriber come useless or less'eflicientin operation. My construct-ion compr sesatubular casthreaded upperextremity 6Q.

- i vv thin the casing is a longitudinally slidab'le tubular member 7 havingaiiange'd head 8 and its lower ,end 9 exteriorly screwthreaded and projecting below the internally flanged extremity of the casing. I

A tubular-coupling 10 is screwed into the upper end of the casing after member 7 has been inserted therein. After thus being screwed home inthe casing,'the tubular cou- :pling is circumferentially welded thereto as at 11.

In the modified form of my invention shown in Fig. 3 flanged head 8 and internaling ihavi'ng an internally flanged. lower extremity 5 and an internally -screw flange 5 at the lower end of the casing are circumferentially scored as shown at 12 and 13 respectively.

For use in a deep well a strainer pipe 14;

is screwed to the lower end of the tubular member 7. The discharge pipe 16 is con nected to couplinglO directly or by mea-ns'of a bushing such as 17 Figure 2 illustrates acommon practice in 7 oil well drilling where the well casing 18 is cemented off; at 19. Obviously if expansion is not provided for, and the dischargepipe is bottomed in the well expansion-will result "either in buckling the lower end of the 'dis chargepipe or breaking the cement seal 19 .and damaging the closure of the well at the surface of the ground.

I prefer to undercut the opposed faces of the flanges at5 and 8 as shown to best advantage in Fig. 1. This undercutting is done at the same angle so that these opposed flange faces may become mutually engaged.

This undercutting has a tendency to prevent stretching of the flanged extremity of the casing when heavy weights are hung upon tubular member 7,

Having thus fully described my invention in a manner that will be clear to those familiar with the art concerned, I claim:

1. An expansion joint comprising; a tubular casing having an internally flanged extremity; and a longitudinally slidable tubular member having a flanged head within the casing, and its other end projecting from said extremity; the opposed faces of said flanges being undercut at the same angle to adapt them for mutual. engagement to resist peripheral stretching of said extremity when said joint is subjected to tension.

2. An expansion joint comprising; a tubular casing having an internally flanged extremity;and a longitudinally slidable tubular member having a flanged head within the casing, and its other end projecting from said extremity; the opposed faces of said flanges being undercut at the same angle to adapt them for mutual engagement to resist peripheral stretching of said extremity when said joint is subjected to tension; and the peripheries of both said flanges being circumterentially scored.

3. An expansion joint comprising; a tubular casing having one of its extremities internally screw-threaded and the other extremity internally flanged; a longitudinally slidable tubular member having a flanged head within the casing and its other end projecting from said flanged extremity; and a tubular coupling screwed into the threaded extremity of the casing "for retaining said slidable member therein; the opposed faces of said flanges being undercut at the same angle to adapt them for mutual engagement to resist peripheral stretching of said extremity when said joint is subjected to tension.

4:. In a. well in combination with a discharge line an intermediate expansion joint in the line comprising; a tubular casing having an internally screw-threaded extremity and an opposed internally flanged extremity; a longitudinally slidable tubular member-having a flanged head within said easing, and its other end projecting from said flanged extremity; and a bored fitting screwed into the threaded extremity of said casing for retaining said slidable member therein; said fitting being circumt'erentially welded to said casing after being screwed thereinto; and the opposed faces of said flanges being undercut at the same angle to adapt them for mutual engagement to resist peripheral stretching of said internally flanged extremity when said joint is subjected to tension.

LEROY H. PERRY. 

